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9.2
Main Site "Trunk Line" Video Inputs
9.3
Control Data Lines in Satellite Systems
9.4
Satellite Site Programming Requirements
EN | 22
At the main site, video trunk line connections coming from each of the remote
site(s) should be connected (and properly terminated) using an available video input
at the main bay. There are no programming restrictions concerning their connec-
tions, but a sense of order can be maintained if a group of video inputs are used at
the upper end of the system's designed capacity. This technique allows the main sys-
tem to be more easily expanded in the future with additional local cameras or trunk
lines. As an example, assume there are a total of eight trunk lines coming from all
satellite sites which are connected to a main site system designed for 32 inputs.
Inputs 25 to 32 can be reserved for the trunk lines, leaving inputs 1 to 24 for local
camera connections. If there will be no local camera inputs, the trunk lines can start
at the first video input.
Each satellite site must be provided with an Allegiant biphase control data line com-
ing from the Signal Distribution located at the main site. This data line carries all
pan/tilt/zoom control commands, in addition to the switching commands generated
by the main site switcher. The control data line should be connected to a LTC 8780
Series Data Converter unit, which provides address decoding functions for the satel-
lite site. An LTC 8780 Series is required for each satellite site, and must be given a
unique site address number. If operators stationed at the satellite site are permitted
to control pan/tilt/zoom-equipped cameras, an LTC 8569 Series Code Merger unit
must be installed at the satellite site. In order for each site to have control over pan/
tilt/zoom-equipped cameras, the Code Merger combines code generated by the
main and satellite sites. The LTC 8780 Series can then be connected to one of the
data outputs of the LTC 8569 Series unit.
The optional LTC 8059/00 MCS or the optional LTC 8850/00 GUI Software is
required to properly program a satellite system.
Programming the satellite sites is usually limited to designating their logical camera
numbers to appropriate values via the Camera ID Table of the MCS or GUI Soft-
ware. Note that no duplicate logical camera numbers are permitted anywhere in the
system. Allegiant logical camera designations can be renumbered to any four-digit
number on all Allegiant Series systems, except the LTC 8500 Series, which is limited
to three (3) digits. Few other restrictions exist. These camera numbers are the num-
bers entered at both the satellite and the main site keyboards when camera selec-
tions are made. On any AutoDome Series camera or conventional pan/tilt/zoom-
equipped camera, this logical number must also be entered as the receiver/driver's
site address number.
Bosch Security Systems | December 13, 2005
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